Here's a nice color coded map that's easy to read:
View attachment 297005
So as we can see in the bottom image we have a dark green layer at the bottom left, then a light blue above it. We have purples and pinks above that, then we have gray and a couple of green bands, a blue band, then a thick orange band, then dark green, pink, light green, and yellow.
So, as we can see in this cross section of west virginia, there isn't anything particularly complicated going on. In some places on the left of the map, older layers are pushed above younger ones. But for the most part, this doesn't obstruct our ability to see the simple order of layers, both in a subsurface view and at a surface view.
At a surface view moving from west to east we would see a repeating pattern where there is a syncline. So we would see green, blue, orange, pink, light green, yellow, light green, pink, orange, blue, green. Thereby allowing us to confirm the accuracy of our map while still understanding what is below the surface of the ground.
Then once we've established the order of rocks (which ones are deepest and oldest and which are shallowest and youngest), we can then look at the fossils in those rocks to determine the fossil succession, which we can then use to either confirm or reject the theory of evolution.
@Religiot feel free to let me know if you have any difficulty determining what layers are older and what layers are younger in the above maps.
And if it helps, just like with my chair analogy, a chair has to be present before I am present if I sit on a chair, else if I tried sitting before a chair is present, I would fall on the ground. The same goes with reading the above maps. The lower rock layers must be present before the upper rock layers, else the upper layers would be floating in mid air or would fall through empty space. Therefore, the lower layers must be older than the layers above then.
This is the scientific law of superposition:
And once we agree that there is a temporal order of rocks (oldest on the bottom, youngest on the top), then we can look at fossils in those rocks and we can determine what fossils are older and what fossils are younger and we can then establish our fossil succession which can then be used to either affirm or disprove the theory of evolution.